Welcome to Bake Club, Amy. She did some fantastic baking for our coffee group. Here's Annabel Langbein's orange cake:

1 orange (unpeeled)

1 tsp Baking soda

125gms softened butter

1 cup sugar

2 eggs

1 tsp vanilla extract

2 cups flour

1 cup sultanas or raisins

1/2 cup chopped walnuts (optional)

Preheat oven to 160 deg C (fanbake). Grease a 20cm diameter cake tin and line the base with baking paper.

Cut the orange into quarters, remove the seeds and whizz in a food processor until finely chopped. Dissolve B soda in 1/2 cup water and add to the food processor with butter, sugar, eggs, vanilla and flour. Whizz to combine. Add sultanas or raisins, and walnuts if using, and stir with a spoon or pulse several times to just combine (don't whizz them or they will break up)

Pour into prepared cake tin and bake until a skewer inserted into the centre comes out clean. (about 1 hour)